योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-96, verse-18

अहं चिन्मात्रममलमित्यात्मानुभवं स्वयम् ।
अपहन्त्यात्महन्तारो निमज्जन्त्यापदर्णवे ॥ १८ ॥

ahaṃ cinmātramamalamityātmānubhavaṃ svayam ,
apahantyātmahantāro nimajjantyāpadarṇave 18

18. aham cit-mātram amalam iti ātma-anubhavam svayam
apahanti ātma-hantāraḥ nimajjanti āpad-arṇave

18. ātma-hantāraḥ aham cit-mātram amalam iti svayam
ātma-anubhavam apahanti āpad-arṇave nimajjanti

18. Those who deny this self-realization (ātmanubhava) – 'I am pure, immaculate consciousness (cit)' – are indeed destroyers of the self (ātman), and they sink into an ocean of calamity.

Words meanings summery:

• अहम् (aham) - I

• चित्-मात्रम् (cit-mātram) - pure consciousness, mere consciousness

• अमलम् (amalam) - immaculate, pure, stainless, free from impurity

• इति (iti) - indicating the preceding statement is a quotation or a thought. (thus, so, in this way)

• आत्म-अनुभवम् (ātma-anubhavam) - self-realization, experience of the self

• स्वयम् (svayam) - by oneself, spontaneously, personally

• अपहन्ति (apahanti) - they deny, they destroy, they reject

• आत्म-हन्तारः (ātma-hantāraḥ) - self-destroyers, those who kill the self

• निमज्जन्ति (nimajjanti) - they sink, they dive into

• आपद्-अर्णवे (āpad-arṇave) - into the ocean of calamity, in the sea of distress

Words meanings and morphology

अहम् (aham) - I

(pronoun)

Nominative, singular of asmad

asmad - I, we (first person pronoun)

Note: Subject of the sentence.

चित्-मात्रम् (cit-mātram) - pure consciousness, mere consciousness

(noun)

Nominative, neuter, singular of cit-mātra

cit-mātra - mere consciousness, pure consciousness, intellect only

Compound type : karmadhāraya (cit+mātra)

• cit – consciousness, intellect, understanding, knowledge
  noun (feminine)
• mātra – only, merely, solely, pure, measure
  adjective (neuter)

Note: Predicate nominative for aham.

अमलम् (amalam) - immaculate, pure, stainless, free from impurity

(adjective)

Nominative, neuter, singular of amala

amala - pure, clean, spotless, immaculate, free from impurity

From a (negation) + mala (dirt, impurity)

Compound type : nañ-tatpuruṣa (a+mala)

• a – not, non-, un-
  indeclinable
• mala – dirt, impurity, stain, defilement
  noun (masculine)

Note: Agrees with cit-mātram.

इति (iti) - indicating the preceding statement is a quotation or a thought. (thus, so, in this way)

(indeclinable)

आत्म-अनुभवम् (ātma-anubhavam) - self-realization, experience of the self

(noun)

Accusative, neuter, singular of ātma-anubhava

ātma-anubhava - self-realization, experience of the self, immediate knowledge of the soul

Compound type : ṣaṣṭhī-tatpuruṣa (ātman+anubhava)

• ātman – self, soul, spirit, supreme soul
  noun (masculine)
• anubhava – experience, perception, realization
  noun (masculine)
  From anu-bhū (to experience)
  Prefix: anu
  Root: bhū (class 1)

Note: Object of the verb apahanti.

स्वयम् (svayam) - by oneself, spontaneously, personally

(indeclinable)

Note: Modifies ātma-anubhavam or the act of denying it.

अपहन्ति (apahanti) - they deny, they destroy, they reject

(verb)

3rd person , plural, active, present indicative (laṭ) of apahan

From apa-han (to strike off, remove, deny)

Prefix: apa

Root: han (class 2)

Note: Subject is ātma-hantāraḥ.

आत्म-हन्तारः (ātma-hantāraḥ) - self-destroyers, those who kill the self

(noun)

Nominative, masculine, plural of ātma-hantṛ

ātma-hantṛ - self-destroyer, one who kills the soul, one who obstructs his own spiritual progress

Agent noun from ātman + root han

Compound type : ṣaṣṭhī-tatpuruṣa (ātman+hantṛ)

• ātman – self, soul, spirit, supreme soul
  noun (masculine)
• hantṛ – slayer, killer, destroyer
  noun (masculine)
  Agent noun
  From root han (to strike, kill) + tṛ
  Root: han (class 2)

Note: Subject of apahanti and nimajjanti.

निमज्जन्ति (nimajjanti) - they sink, they dive into

(verb)

3rd person , plural, active, present indicative (laṭ) of nimajj

From ni-majj (to sink)

Prefix: ni

Root: majj (class 6)

Note: Subject is ātma-hantāraḥ.

आपद्-अर्णवे (āpad-arṇave) - into the ocean of calamity, in the sea of distress

(noun)

Locative, masculine, singular of āpad-arṇava

āpad-arṇava - ocean of calamity, sea of distress

Compound type : ṣaṣṭhī-tatpuruṣa (āpad+arṇava)

• āpad – calamity, misfortune, distress, danger
  noun (feminine)
• arṇava – ocean, sea, flood
  noun (masculine)

Note: Indicates the place or state into which they sink.